Mixing and coagulating device



June 8, 1937. M B TARK 2,082,855

MIXING AND COAGUL ATING DEVICE Filed Jan. 25 1936 2 Sheets-Sheet l Jae/2Z0?" Jfarcasli YEW/- fliarmeys:

June 8, 1937. TARK I 2,082,855

MIXING AND GOAGULA'TING DEVICE Filed Jan. 25, 1936 2 Sheets-Sheet 2 @f Am Patented June 8, 1937 s PATENT, OFFICE Marcus B. Tark, Philadelphia,'Pa., assignor to Link-Belt Company, Chicago, 111., a corporation ofIllinois" I Application January 25, 1936, Serial No. 60,800

3 Claims. (01. 59- 04) My invention relates to improvements-in mixchains22 from the shaft I 5, there being sprocking and coagulating devices andhas for one obets 2la on each shaft to drive said chains. By ject toprovide a new and improved'form. of such this arrangement all the shaftscontained within device wherein the necessary agitation of the mathetank may'be driven in unison. By the arterial may be easily andconveniently adjusted rangement shown they mayall bedriven in the 5 andmay, if desired, be differentially controlled same direction.Gearboxes"23 may be used in in different parts of the flocculating tank.connection with one or more 'of the shafts to Other objects will appearfrom timeto time change the direction of rotation, if it is desired fIUNITED STATE throughout the specification and claims; as will normallybe the case, so that the shafts in My invention is illustrated more orless diadrive in opposite directions. grammatically in the accompanyingdrawings, Mounted on each shaft at two spaced points whereinbetween eachpair of bearings are hubs 24 held Figure 1 is a plan view; i in'positionon the shaft by means of set screws Figure 2 is a longitudinal verticalsection along Profiecting from eac of t ese bs a e a 5 the line 2-2 ofFigural; plurality of radial arms 26. Each pair of radial 5 Figure 3 isa transverse cross section along the arms carries a paddle blade 21.Each P d e line 3-3 of Figure 1; w blade 2? is mounted on two brackets28, the Figure 4 is adetail side elevation of one form r k havin n car29 ext n n r w r ly of blade support; to engage a stirrup 30. A nut andbolt 31 allows Figure 5 is a detail of a modified f rm, this ear to belocked in angular position with 20 Like characters indicate like partsthroughrespect the Stirrup and -b a nu t th specification and drawings32 permit adjustment of the stirrup radially, as

l is a tank having extending across one end indicattjd Figure n e od fed orm an infiuent channel 2, adapted to receive liquid shown In Flglllethe blade F i mounted 011 through a conduit 3, and to discharge it intothe a bracket whlch bracket 1s p v d o o e tank through ports 4, 5 i anm t channel arm of the U and 1s radially slotted at 34 to enextendingacross the opposed end of the tank. gage t othet: arm 50 that thebfacketbe 6 is an adjustable effluent weir extending across held m any Suttableangular posltton by tlghten' substantially the length of the tankadapted to tug up the which hold the t the control the liquid level inthe tank and receive form Show m Ftgure the blade has pwotal 3 theemuent which is withdrawn through a com movement of 180 degrees. In theform shown duit Hm in Figure 5, it has a pivotal movement of butProjecting upwardly from the bottom of the ninety degrees. Under somecircumstances the tank are a series of pedestals 1 of concrete-or addedappl cation of the 180 degree pivotal move- 35 the like. Mounted onthese pedestals are bearment is dettrabte' 35 ings 8. These piers arearranged in a plurality The equipment t t forms the Sub-tect mattoflines parallel with the longitudinal axis of the t of my t t ts Intendedfor use as tank and in line with them on the efiluent wall tmg andagttatmg means for the treatment of of the tank are brackets II], whichcarry end Sewage or stmttar matettat t chemicals 40 bearings ll. Also inline with them in the insewage Water or other hqmdt are to be t 40fluent Wall are bearings l2. l3, l3 are shafts P t dosed to causecoagulatlon or flocculatlon' extending the length of the tank supportedin It IS necessary compamuvely Small the bearings a H and It The Shaftmay be amount of chemical be entirely d ffused throughcontinuous or asindicated may be formed of a out the enttre "P of llquld and e e Seriesof Shaft Sections arranged end to end and a controlled period ofdetention toinsure um-. 45

form dosage and uniform reaction. In order to accomplish this, theliquid is usually pre-treated 3 5; 3:2 3:2 32:1,: ii ifi g i f s g withthe chemical before it is introduced to the the wan adapted to be drivena mo tank, then is allowed. to the tank tor 5 It Carries a Sprocket nwhich drives a is detained there for a sufficient length of time 50chain l8 to drive the sprocket 14 on the central 130 permit adequatemiXing 0 thewater with the shaft. On each side of the drive shaft l5 areChemical, and a Sufficient D cd Of time for the shafts l9, each carryinga sprocket 20 t d iv chemical reactions tobe completed. After that bymeans of chain 2| similar sprockets I4 on the the mixed q d is Withdrawno a S tli g outboard shafts. The shafts l9 are driven by The paddles andsupporting arms are as indi- 55 joined by collars 13a. The influent endof each cated entirely submerged beneath the liquid level. The shaftsrotate at relatively slow speed and cause a mild agitation and mixing ofthe liquid. Since the shafts rotate preferably in opposite directions,eddy currents will be set up and the liquid will be mixed andintermingled. In order to permit this mixing effect, I mount on theshafts the plurality of radial arms as shown. Depending upon the resultsdesired, the character of the material being treated and the like, theeffect of the mixing machinery will be controlled and adjusted byradially positioning the paddles at different points. Thus of course,effecting the rate of travel of the blade through the liquid. Again thepaddle blades themselves may be given various angular inclinations alldepending upon the experience of the operator and the necessity of theoccasion.

Under some circumstances, the adjustment of all the paddles will be thesame. Under other circumstances they might all be different andvariations or gradations along the tank either in the direction of flowor transverse to it, will be desirable. The arrangement which I haveproposed then makes it possible to adjust the violence of the mixingeffect quite independent of the power mechanism and quite independent ofthe rate of rotation. The details of construction may differ and I donot limit my invention to the machine shown and described.

It will be evident that while I have shown and described an operatingdevice, still many changes might be made in the size, shape, arrangementand disposition of parts without departing materially from the spirit ofmy invention and I wish, therefore, that my showing be taken as in alarge sense diagrammatic.

I claim:

a tank, pedestals therein, bearings mounted on said pedestals, a shaftsupported by said bearings and extending longitudinally of the tank,radial arms projecting from the shaft, there being not less than twobetween each two bearings, brackets slidable radially along said armsand means for locking them in adjusted position, blades locatedgenerally parallel with the shaft and pivotally supported on saidbrackets and means for locking them in angularly adjusted position.

3. A mixing and flocculating device comprising a tank, pedestalstherein, bearings mounted on said pedestals, a shaftsupported by saidbearings and extending longitudinally of the tank, radial armsprojecting from the shaft, there being not less than two between eachtwo bearings, brackets slidable radially along said arms and means forlocking them in adjusted position, blades located generally parallelwith the shaft and pivotally supported on said brackets and means forlocking them in angularly adjusted position, drive means above the levelof the liquid in the tank comprising a motor and drive shaft, a sprocketoverhanging the wall of the tank, a sprocket on the shaft and a drivingconnection between the sprockets whereby the motor may cause rotation ofthe shaft.

MARCUS B. TARK.

